LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES (Details 8) - Loans Receivable - USD ($) $ in Thousands		Jun. 30, 2015	Dec. 31, 2014
Recorded investment in total loans receivable related to each balance in the allowance for loan losses
Individually evaluated for impairment		$ 174,638	$ 164,732
Collectively evaluated for impairment		20,618,172	20,240,300
Acquired with deteriorated credit quality	[1]	1,171,802	1,322,113
Total loans	[1]	21,964,612	21,727,145
CRE
Recorded investment in total loans receivable related to each balance in the allowance for loan losses
Individually evaluated for impairment		51,392	66,514
Collectively evaluated for impairment		6,588,929	6,035,702
Acquired with deteriorated credit quality	[1]	646,552	717,297
Total loans	[1]	7,286,873	6,819,513
C&I
Recorded investment in total loans receivable related to each balance in the allowance for loan losses
Individually evaluated for impairment		82,917	45,145
Collectively evaluated for impairment		7,996,635	7,942,436
Acquired with deteriorated credit quality	[1]	71,112	89,620
Total loans	[1]	8,150,664	8,077,201
Residential
Recorded investment in total loans receivable related to each balance in the allowance for loan losses
Individually evaluated for impairment		39,076	51,814
Collectively evaluated for impairment		4,331,039	4,779,465
Acquired with deteriorated credit quality	[1]	427,517	485,410
Total loans	[1]	4,797,632	5,316,689
Consumer
Recorded investment in total loans receivable related to each balance in the allowance for loan losses
Individually evaluated for impairment		1,253	1,259
Collectively evaluated for impairment		1,701,569	1,482,697
Acquired with deteriorated credit quality	[1]	26,621	29,786
Total loans	[1]	$ 1,729,443	$ 1,513,742

[1] Loans net of ASC 310-30 discount.